Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
  • C07F9/02—Phosphorus compounds
  • C07F9/06—Phosphorus compounds without P—C bonds
  • C07F9/22—Amides of acids of phosphorus
  • C07F9/24—Esteramides
  • C07F9/2404—Esteramides the ester moiety containing a substituent or a structure which is considered as characteristic
  • C07F9/2412—Esteramides the ester moiety containing a substituent or a structure which is considered as characteristic of unsaturated acyclic alcohols
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
  • C07F9/02—Phosphorus compounds
  • C07F9/06—Phosphorus compounds without P—C bonds
  • C07F9/16—Esters of thiophosphoric acids or thiophosphorous acids
  • C07F9/165—Esters of thiophosphoric acids
  • C07F9/173—Esters of thiophosphoric acids with unsaturated acyclic alcohols
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
  • C07F9/02—Phosphorus compounds
  • C07F9/06—Phosphorus compounds without P—C bonds
  • C07F9/16—Esters of thiophosphoric acids or thiophosphorous acids
  • C07F9/165—Esters of thiophosphoric acids
  • C07F9/20—Esters of thiophosphoric acids containing P-halide groups

Definitions

• This invention relates to novel O-(halovinyl) phosphorodichloridothioates and their method of preparation. More particularly, this invention relates to novel O-(2,2- dichlorovinyl) phosphorodichloridothioate and O-(2- chlorovinyl) phosphorodichloridothioate and the method of preparation of these compounds.
• Beta-halovinyl phosphates are well known in the art to be biologically active and numerous references in the patent literature as well as other publications document the activity of these compounds as biologicals. For example see Lichtenthaler Chem. Rev., vol. 61, pp. 607-649. While certain of the corresponding beta-chlorovinyl thionophosphates are known in the art (see Seume et al., Toxicol. Appl. PharmacoL, 2, 495 (1960); and Ward et al., U.S. Pat. 3,174,990), certain other beta-halovinyl thionophosphates have heretofore been unobtainable.
• X in the above formula is preferably chlorine, it may also be selected from the group consisting of bromine, chlorine, fluorine, and iodine.
• X is preferably chlo rine, but may also be bromine, fluorine, iodine or hydrogen.
• the compounds of this invention may be prepared by the reaction of O-(halovinyl) phosphorodichloridates with phosphorous pentasulfide.
• the starting phosphorodichloridate is obtained by the treatment of dimethyl 2,2-dichlorovinyl phosphate with thionyl chloride in the presence of dimethylformamide (DMF), as described in Belgian Pat. 694,814, dated Feb. 28, 1967.
• DMF dimethylformamide
• the compounds of the present invention may be further reacted or converted into biologically active compounds by reacting them with an alcohol in the presence of a base or with a metal alcoholate in an organic solvent such as tetrahydrofuran or benzene.
• O-(2-chlorovinyl) phosphorodichloridothioate may be prepared in like manner.
• O-(2-chloro-2-fluorovinyl) phosphorodichloridothioate A mixture of 60 grams of O-(2-chloro-2-fluorovinyl) phosphorodichloridate and 22 grams of P 8 was heated with stirring at 110-120 C. using an oil bath. After two hours the mixture was cooled and 2 volumes of pentane was added. The solution was decanted from a tarry insoluble residue and stripped and distilled under reduced pressure. A 24 gram fraction boiling at 75-82 C. (30 mm. pressure) was collected containing O-(2-chloro-2- fiuorovinyl) phosphorodichloridothioate.
• the reaction may be carried out by heating the phosphorodichloridate with phosphorous pentasulfide at a temperature of about to C. for about 4 to 6 hours or until the reaction is completed.
• the ingredients are usually reacted in a molar ratio of about 2 to 3 moles of the phosphorodichloridate to 1.0 mole of phosphorus pentasulfide.
• the reaction product may be recovered from the reaction mixture by conventional procedure such as dilution with a solvent such as methylene chloride followed by filtration to remove any precipitate that may have formed.
• the filtrate may then be distilled to remove the solvent after which the product may be recovered by fractional distillation.
• the compounds of this invention may be used as intermediates to prepare beta-halovinyl thionophosphates and particularly the dialkyl beta-halovinyl thionophosphates which are useful as pesticides and also as anthelmintics.
• the filtrate was stripped in a rotating evaporator at 40 C. at 0.5 millimeter of pressure to leave a residue of 26.4 grams.
• This crude residue was further distilled in a falling film molecular still at 61 C. (0.02 millimeter pressure) to yield 11.4 grams of a distillate, 2.0 grams of residue,.and 7.3 grams of light ends.
• the distillate and light ends were combined and redistilled through an '8" x helix pack column and a variable reflux head to yield 12 grams of product (41.5%).
• the composition of the product was determined by gas liquid chromatography (GLC) andfurther identification of the product was made by NMR spectrum as well as by infrared analysis.
• Elemental analysis was made of the product containing O- (2,2-dichlorovinyl) 0,0-dimethyl phosphorothioate and a minor amount of the starting material O-(2,2-dichlorovinyl) phosphorodichloridothioate.
• EXAMPLE IV The mammalian toxicity for the compound prepared in Example IV was measured in terms of the LD' in mice, i.e.- the milligrams of active ingredient per kilogram of body weight to be lethal to 50% of the mice tested, and was found to be 933 milligrams per kilogram.
• LD' the milligrams of active ingredient per kilogram of body weight to be lethal to 50% of the mice tested
• Parathion as a housefly insecticide standard
• it was found to have a toxicity index (T.-I.) of about 36-48 (Parathion 100').
• Parathion has an LD in rats of about 6-15 milligrams per kilogram.
• O-(2,2-dichlorovinyl) 0,0-dimethyl phosphorothioate is not as active as insecticide as Parathion at equal concentrations, it is an effective insecticide and possesses a much lower degree of mammalian toxicity.

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• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Biochemistry (AREA)
• General Health & Medical Sciences (AREA)
• Molecular Biology (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=22151769

Family Applications (1)

Country Status (3)

Cited By (1)

Families Citing this family (1)

• 1970
  • 1970-10-09 US US79630A patent/US3701818A/en not_active Expired - Lifetime
• 1971
  • 1971-10-07 ZA ZA716720A patent/ZA716720B/xx unknown
  • 1971-10-07 GB GB4669371A patent/GB1341506A/en not_active Expired

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